/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <sal/log.hxx>
#include <comphelper/DirectoryHelper.hxx>
#include <recentdocsview.hxx>
#include <sfx2/sfxresid.hxx>
#include <unotools/historyoptions.hxx>
#include <vcl/event.hxx>
#include <vcl/ptrstyle.hxx>
#include <vcl/svapp.hxx>
#include <tools/urlobj.hxx>
#include <com/sun/star/frame/XDispatch.hpp>
#include <sfx2/strings.hrc>
#include <bitmaps.hlst>
#include "recentdocsviewitem.hxx"
#include <sfx2/app.hxx>

#include <officecfg/Office/Common.hxx>

#include <map>

using namespace ::com::sun::star;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using namespace com::sun::star::beans;

namespace {

/// Set (larger) font for the Welcome message.
void SetMessageFont(vcl::RenderContext& rRenderContext)
{
    vcl::Font aFont(rRenderContext.GetFont());
    aFont.SetFontHeight(aFont.GetFontHeight() * 1.3);
    rRenderContext.SetFont(aFont);
}

}

namespace sfx2
{

constexpr tools::Long gnTextHeight = 30;
constexpr tools::Long gnItemPadding = 5;

RecentDocsView::RecentDocsView(std::unique_ptr<weld::ScrolledWindow> xWindow, std::unique_ptr<weld::Menu> xMenu)
    : ThumbnailView(std::move(xWindow), std::move(xMenu))
    , mnFileTypes(ApplicationType::TYPE_NONE)
    , mnLastMouseDownItem(THUMBNAILVIEW_ITEM_NOTFOUND)
    , maWelcomeLine1(SfxResId(STR_WELCOME_LINE1))
    , maWelcomeLine2(SfxResId(STR_WELCOME_LINE2))
    , mpLoadRecentFile(nullptr)
    , m_nExecuteHdlId(nullptr)
{
    mbAllowMultiSelection = false;
    AbsoluteScreenPixelRectangle aScreen = Application::GetScreenPosSizePixel(Application::GetDisplayBuiltInScreen());
    mnItemMaxSize = std::min(aScreen.GetWidth(),aScreen.GetHeight()) > 800 ? 256 : 192;

    setItemMaxTextLength( 30 );
    setItemDimensions( mnItemMaxSize, mnItemMaxSize, gnTextHeight, gnItemPadding );

    maFillColor = Color(ColorTransparency, officecfg::Office::Common::Help::StartCenter::StartCenterThumbnailsBackgroundColor::get());
    maTextColor = Color(ColorTransparency, officecfg::Office::Common::Help::StartCenter::StartCenterThumbnailsTextColor::get());

    const StyleSettings& rSettings = Application::GetSettings().GetStyleSettings();
    maHighlightColor = rSettings.GetHighlightColor();
    maHighlightTextColor = rSettings.GetHighlightTextColor();

    mfHighlightTransparence = 0.75;

    UpdateColors();
}

RecentDocsView::~RecentDocsView()
{
    Application::RemoveUserEvent(m_nExecuteHdlId);
    m_nExecuteHdlId = nullptr;
    if (mpLoadRecentFile)
    {
        mpLoadRecentFile->pView = nullptr;
        mpLoadRecentFile = nullptr;
    }
}

bool RecentDocsView::typeMatchesExtension(ApplicationType type, std::u16string_view rExt)
{
    bool bRet = false;

    if (rExt == u"odt" || rExt == u"fodt" || rExt == u"doc" || rExt == u"docx" ||
        rExt == u"rtf" || rExt == u"txt" || rExt == u"odm" || rExt == u"otm")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_WRITER);
    }
    else if (rExt == u"ods" || rExt == u"fods" || rExt == u"xls" || rExt == u"xlsx")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_CALC);
    }
    else if (rExt == u"odp" || rExt == u"fodp" || rExt == u"pps" || rExt == u"ppt" ||
            rExt == u"pptx")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_IMPRESS);
    }
    else if (rExt == u"odg" || rExt == u"fodg")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_DRAW);
    }
    else if (rExt == u"odb")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_DATABASE);
    }
    else if (rExt == u"odf")
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_MATH);
    }
    else
    {
        bRet = static_cast<bool>(type & ApplicationType::TYPE_OTHER);
    }

    return bRet;
}

bool RecentDocsView::isAcceptedFile(const INetURLObject& rURL) const
{
    const OUString aExt = rURL.getExtension();
    return (mnFileTypes & ApplicationType::TYPE_WRITER   && typeMatchesExtension(ApplicationType::TYPE_WRITER,  aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_CALC     && typeMatchesExtension(ApplicationType::TYPE_CALC,    aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_IMPRESS  && typeMatchesExtension(ApplicationType::TYPE_IMPRESS, aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_DRAW     && typeMatchesExtension(ApplicationType::TYPE_DRAW,    aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_DATABASE && typeMatchesExtension(ApplicationType::TYPE_DATABASE,aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_MATH     && typeMatchesExtension(ApplicationType::TYPE_MATH,    aExt)) ||
           (mnFileTypes & ApplicationType::TYPE_OTHER    && typeMatchesExtension(ApplicationType::TYPE_OTHER,   aExt));
}

void RecentDocsView::insertItem(const OUString& rURL, const OUString& rTitle,
                                const OUString& rThumbnail, bool isReadOnly, bool isPinned,
                                sal_uInt16 nId)
{
    AppendItem(std::make_unique<RecentDocsViewItem>(*this, rURL, rTitle, rThumbnail, nId,
                                                    mnItemMaxSize, isReadOnly, isPinned));
}

void RecentDocsView::Reload()
{
    Clear();

    std::vector< SvtHistoryOptions::HistoryItem > aHistoryList = SvtHistoryOptions::GetList( EHistoryType::PickList );
    for ( size_t i = 0; i < aHistoryList.size(); i++ )
    {
        const SvtHistoryOptions::HistoryItem& rRecentEntry = aHistoryList[i];

        OUString aURL = rRecentEntry.sURL;
        const INetURLObject aURLObj(aURL);

        if ((mnFileTypes != ApplicationType::TYPE_NONE) &&
            (!isAcceptedFile(aURLObj)))
            continue;

        //Remove extension from url's last segment and use it as title
        const OUString aTitle = aURLObj.GetBase(); //DecodeMechanism::WithCharset

        insertItem(aURL, aTitle, rRecentEntry.sThumbnail, rRecentEntry.isReadOnly,
                   rRecentEntry.isPinned, i + 1);
    }

    CalculateItemPositions();
    Invalidate();
}

void RecentDocsView::setFilter(ApplicationType aFilter)
{
    mnFileTypes = aFilter;
    Reload();
}

void RecentDocsView::clearUnavailableFiles(){
    std::vector< SvtHistoryOptions::HistoryItem > aHistoryList = SvtHistoryOptions::GetList( EHistoryType::PickList );
    for ( size_t i = 0; i < aHistoryList.size(); i++ )
    {
        const SvtHistoryOptions::HistoryItem& rPickListEntry = aHistoryList[i];
        if ( !comphelper::DirectoryHelper::fileExists(rPickListEntry.sURL) ){
            SvtHistoryOptions::DeleteItem(EHistoryType::PickList,rPickListEntry.sURL, false);
        }
    }
    Reload();
}

bool RecentDocsView::MouseButtonDown( const MouseEvent& rMEvt )
{
    if (rMEvt.IsLeft())
    {
        mnLastMouseDownItem = ImplGetItem(rMEvt.GetPosPixel());

        // ignore to avoid stuff done in ThumbnailView; we don't do selections etc.
        return true;
    }

    return ThumbnailView::MouseButtonDown(rMEvt);
}

bool RecentDocsView::MouseButtonUp(const MouseEvent& rMEvt)
{
    if (rMEvt.IsLeft())
    {
        if( rMEvt.GetClicks() > 1 )
            return true;

        size_t nPos = ImplGetItem(rMEvt.GetPosPixel());
        ThumbnailViewItem* pItem = ImplGetItem(nPos);

        if (pItem && nPos == mnLastMouseDownItem)
        {
            pItem->MouseButtonUp(rMEvt);

            ThumbnailViewItem* pNewItem = ImplGetItem(nPos);
            if(pNewItem)
                pNewItem->setHighlight(true);
        }

        mnLastMouseDownItem = THUMBNAILVIEW_ITEM_NOTFOUND;

        if (pItem)
            return true;
    }
    return ThumbnailView::MouseButtonUp(rMEvt);
}

void RecentDocsView::OnItemDblClicked(ThumbnailViewItem *pItem)
{
    RecentDocsViewItem* pRecentItem = dynamic_cast< RecentDocsViewItem* >(pItem);
    if (pRecentItem)
        pRecentItem->OpenDocument();
}

void RecentDocsView::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle &aRect)
{
    ThumbnailView::Paint(rRenderContext, aRect);

    if (!mItemList.empty())
        return;

    if (maWelcomeImage.IsEmpty())
    {
        const tools::Long aWidth(aRect.GetWidth() > aRect.getOpenHeight() ? aRect.GetHeight()/2 : aRect.GetWidth()/2);
        maWelcomeImage = SfxApplication::GetApplicationLogo(aWidth);
    }

    // No recent files to be shown yet. Show a welcome screen.
    rRenderContext.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
    SetMessageFont(rRenderContext);
    rRenderContext.SetTextColor(maTextColor);

    tools::Long nTextHeight = rRenderContext.GetTextHeight();

    const Size& rImgSize = maWelcomeImage.GetSizePixel();
    const Size& rSize = GetOutputSizePixel();

    const int nX = (rSize.Width() - rImgSize.Width())/2;
    int nY = (rSize.Height() - 3 * nTextHeight - rImgSize.Height())/2;
    Point aImgPoint(nX, nY);
    rRenderContext.DrawBitmapEx(aImgPoint, rImgSize, maWelcomeImage);

    nY = nY + rImgSize.Height();
    rRenderContext.DrawText(tools::Rectangle(0, nY + 1 * nTextHeight, rSize.Width(), nY + nTextHeight),
                            maWelcomeLine1,
                            DrawTextFlags::Center);
    rRenderContext.DrawText(tools::Rectangle(0, nY + 2 * nTextHeight, rSize.Width(), rSize.Height()),
                            maWelcomeLine2,
                            DrawTextFlags::MultiLine | DrawTextFlags::WordBreak | DrawTextFlags::Center);

    rRenderContext.Pop();
}

void RecentDocsView::LoseFocus()
{
    deselectItems();

    ThumbnailView::LoseFocus();
}

void RecentDocsView::Clear()
{
    Invalidate();
    ThumbnailView::Clear();
}

void RecentDocsView::PostLoadRecentUsedFile(LoadRecentFile* pLoadRecentFile)
{
    assert(!mpLoadRecentFile);
    mpLoadRecentFile = pLoadRecentFile;
    m_nExecuteHdlId = Application::PostUserEvent(LINK(this, RecentDocsView, ExecuteHdl_Impl), pLoadRecentFile);
}

void RecentDocsView::DispatchedLoadRecentUsedFile()
{
    mpLoadRecentFile = nullptr;
}

IMPL_LINK( RecentDocsView, ExecuteHdl_Impl, void*, p, void )
{
    m_nExecuteHdlId = nullptr;
    LoadRecentFile* pLoadRecentFile = static_cast<LoadRecentFile*>(p);
    try
    {
        // Asynchronous execution as this can lead to our own destruction!
        // Framework can recycle our current frame and the layout manager disposes all user interface
        // elements if a component gets detached from its frame!
        pLoadRecentFile->xDispatch->dispatch( pLoadRecentFile->aTargetURL, pLoadRecentFile->aArgSeq );
    }
    catch ( const Exception& )
    {
    }

    if (pLoadRecentFile->pView)
    {
        pLoadRecentFile->pView->DispatchedLoadRecentUsedFile();
        pLoadRecentFile->pView->SetPointer(PointerStyle::Arrow);
        pLoadRecentFile->pView->Enable();
    }

    delete pLoadRecentFile;
}

} // namespace sfx2

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */